If you use an argument and someone provides a single counter example, then your argument is false. That's it. You can continue arguing your conclusion or view,

If you use an argument and someone provides a single counter example, then your argument is false. That's it. You can continue arguing your conclusion or view, but you need to find another argument to support it. The fact that humans could invent super-flight despite not being able to build a bird means that the argument that we cannot build a super intelligent machine because we don't yet know how to make ourselves biologically more intelligent, is not a good argument.